Malicious PDF — malware analysis report

Static analysis result for SHA-256 03b46bf6f30eabe6…

MALICIOUS

PDF

39.7 KB Created: 2020-09-30 04:41:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: e63a0cfa922d653f6f8d174b16103873 SHA-1: b8cd391e40fda21918eb197020df1b881337e2c9 SHA-256: 03b46bf6f30eabe609dc5b3a6dc44c5cb9c9c436cb8d9f9893466d301de44b18
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://cctraff.ru/strik?keyword=pdf+annotator+crack+version+download In PDF document text
    • http://files.barcelonacrewacademy.com/uploads/1/3/0/7/130775694/4197060.pdfIn PDF document text
    • http://files.abroadhorizon.com/uploads/1/3/0/9/130969169/pozevuzeg-gibisipalunovap-luwumapifex-zefowifabawozu.pdfIn PDF document text
    • http://files.tandhathletics.com/uploads/1/3/2/3/132303286/xateb.pdfIn PDF document text
    • http://files.upstartcrowcollective.com/uploads/1/3/0/8/130873996/samotex.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/31f2f425-7702-4d3c-bc0e-46bc2502bad6/7236604760.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/494199b5-487b-4c51-ba7e-c0a10700f200/zidulopeluvejed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0adfb29-caad-4dcc-a802-7a859c224ac9/15792272558.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/964e15cd-b8c0-466c-a9ae-57720e448317/garonawidorobivur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ce88d44-c2f6-4c58-b5d6-e96431e5d2ba/68223005584.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b55c6c20-feea-4d1f-b92c-8a670c24756a/87966118889.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d40d09c9-acc1-4bcf-b314-3035a0928b28/27243421036.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6621068e-6540-4b97-bdde-3491da6023c4/19801085550.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005dc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC7 5232 bytes
SHA-256: 7168af6bd4357996e3e5fba9132bcbe99b3603a295bf3dca82f6c7191af55bd4
font_01_sfnt_off00006fc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC0 10028 bytes
SHA-256: 9b9b1c2ee331fdf72881cc4e88b702d2c0f9694d8975393511b31240fd4875be

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